12953728 has 32 divisors (see below), whose sum is σ = 27328860. Its totient is φ = 6094848.

The previous prime is 12953723. The next prime is 12953729. The reversal of 12953728 is 82735921.

It can be written as a sum of positive squares in 2 ways, for example, as 12446784 + 506944 = 3528^2 + 712^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12953723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801 + ... + 5152.

Almost surely, 2^12953728 is an apocalyptic number.

It is an amenable number.

12953728 is an abundant number, since it is smaller than the sum of its proper divisors (14375132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12953728 is an equidigital number, since it uses as much as digits as its factorization.

12953728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984 (or 5972 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 12953728 is about 3599.1287834697. The cubic root of 12953728 is about 234.8541603036.

The spelling of 12953728 in words is "twelve million, nine hundred fifty-three thousand, seven hundred twenty-eight".